Christmas HOLIDAY LIGHT HOOKS - "Put em up and leave em up" These sturdy hooks are made of tough aluminum. They will be rust free for years. The shingle hook is designed to butt right against the aluminum drip edge just under the edge of the shingles or have your contractor install them when having your roof replaced. The hooks should be placed approximately every 18 to 24 inches. Easily painted to match any trim. If using rope lights, the spacing may want to be closer to prevent sagging.